Why is Saturday stronger than Monday?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

The more you take me, the more you leave me behind.
Who Am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?